A. Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
B. On the basis of the amount and their relative harmfulness or toxicity
C. Both (a) & (b)
D. None of these
Related Mcqs:
- The pollutants like phenol, Na and Hg can be removed from water by technique/s such as:
A. Reverse osmosis
B. Electrodialysis
C. Both (a) & (b)
D. None of these - What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?
A. Sulphur di-oxide
B. Carbon di-oxide
C. Nitrogen oxides and fluoro-carbons
D. Carbon monoxide - Some reliable indicators of air pollutants (SO2 and noxious gases) are:
A. Ferns and Cycas
B. Green algae and aquatic liverworts
C. Lichens and mosses
D. Neem’ tree and Eichhornia - Silviculture means:
A. Methods of raising tree crops and their growth and care upto the time of the final harvesting
B. Silviculture is the science and art of cultivating forest crops, based on knowledge of silvics
C. Both (a) & (b)
D. None of these - Green manuring plants are:
A. Egyptian clover (barseem)Trifolium alexandrnum
B. Dhaincha (jayannti) Sesbania aculeata
C. Cowpea (lobia) Vigna sinensis
D. All of the above - The Antarctic ozone hole are:
A. The name given to the first report of changes in the amount of ozone
B. The upper layers of the atmosphere over the south pole
C. Both (a) & (b)
D. None of these - Biosphere means:
A. The part of the earth that supports life and consists of the soil, oceans
B. The waterways and the atmosphere upto 15 km above the earth’s surface
C. Waterways and the
D. None of these - Grasslands are:
A. The prairies of North America and the steppe of Russia and Central Asia
B. Grassland ecosystem support thousand of different species, above and below the ground
C. Both (a) & (b)
D. None of these - Transboundary pollution is:
A. Transboundary pollution describes polluted air and water or any other contaminated waste that is generated in ove country and transmitted to other
B. The most pervasive pollutant is sulphur dioxide a by-product of the burning of fossil fuels in power stations
C. Both (a) & (b)
D. None of these - Termites are:
A. Many parts of the world, but primarily in tropical rain forests
B. They live in highly organized colonies to a strict caste system
C. The nests are built to provide central heating and air-conditioning
D. All of the above
The correct answer to the question: "What is Pollutants:" is "Both (a) & (b) ".
